Energy Transformations

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In what ways can energy be converted from one form to another? Let's take a look.

Energy is all around us. We can't see energy, but we can see the things that energy does. Energy makes things move. It powers the machines we use. It can make things get hotter or produce sound. Energy is used to light up our homes and cities and power the vehicles we use. Plants and other organisms need energy to live, grow and carry out life processes.

Energy cannot be created...nor can it be destroyed. But it can be changed ... or transformed... from one form to another and we can observe this happening around us every day.

Let's take a look at some examples. As each video plays, write down the energy transformations you think are taking place. We'll go through each example at the end so you can check your answers. Let's go.

1. What energy transformation takes place when a ukulele is strummed?

2. What energy transformation takes place when a light bulb is switched on?

3. What transformation takes place when a match is struck?

4. What transformation takes place when a drawn bow and arrow is released?

5. What transformation takes place when an electric kettle is switched on?

6. What energy transformation takes place when a roller coaster rolls down the track?

7. What transformation takes place when an electric doorbell is pressed?

8. What energy transformation takes place when drill is used to secure a screw into wood?

How'd you go...let's take another look.

When a ukulele is strummed, kinetic energy is transformed into sound energy.

When a light bulb is switched on, electrical energy is transformed into light and heat.

When a match is struck, kinetic energy and chemical energy is transformed into light and heat.

Ehen a drawn bow and arrow is released elastic potential energy is converted into electrical energy.

When an electric kettle is switched on, electrical energy is transformed into heat.

When a roller coaster rolls down the track, gravitational potential energy is transformed into kinetic energy.

When an electric doorbell is pressed electrical energy in transformed into kinetic energy and sound.

When drill is used to secure a screw into wood, electrical energy is transformed into kinetic energy.

Take note that in many of the examples provided, heat and sound are also often produced.